2008/06/25 by M. Tajmar, M Tajmar, F. Plesescu +3 · 22 citations
Engineering · Physics and Astronomy · #Advanced Fiber Optic Sensors #Angular velocity #Fibre optic gyroscope #Geophysics and Sensor Technology #Gyroscope #Offset (computer science) #Pulsars and Gravitational Waves Research #Ring laser gyroscope #Rotation (mathematics) #Sagnac effect #Spinning #gr-qc
paper · pdf · doi:10.1088/1742-6596/150/3/032101
published in Journal of Physics Conference Series 150(3), 032101 (IOP Publishing) · Poster presented at the 25th Low Temperature Physics Conference, Amsterdam, Aug 2008, to appear in the Journal of Physics Conference Proceedings
arxiv created 2008/06/25 · openalex publication_date 2009/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Precision fiber optic gyroscopes were mounted mechanically de-coupled above spinning rings inside a cryostat. Below a critical temperature (typically <30 K), the gyroscopes measure a significant deviation from their usual offset due to Earth's rotation. This deviation is proportional to the applied angular ring velocity with maximum signals towards lower temperatures. The anomalous gyroscope signal is about 8 orders of magnitude smaller then the applied angular ring velocity, compensating about one third of the Earth rotation offset at an angular top speed of 420 rad/s. Moreover, our data shows a parity violation as the effect appears to be dominant for rotation against the Earth's spin. No systematic effect was found to explain this effect including the magnetic environment, vibration and helium gas friction suggesting that our observation is a new low temperature phenomenon. Tests in various configurations suggest that the rotating low temperature helium may be the source of our anomalous signals.